What are Acute, Obtuse, Right, and Straight Angles?

What are Acute, Obtuse, Right, and Straight Angles?

Note:

Did you know that there are different kinds of angles? Knowing how to identify these angles is an important part of solving many problems involving angles. Check out this tutorial and learn about the different kinds of angles!

Keywords:

  • definition
  • angle
  • angles
  • acute
  • acute angle
  • acute angles
  • obtuse
  • obtuse angle
  • obtuse angles
  • right
  • right angle
  • right angles
  • straight
  • straight angle
  • straight angles
  • degree
  • degrees
  • 90 degrees
  • 180 degrees
  • less than 90
  • more than 90
  • less than 90 degrees
  • more than 90 degrees
  • greater than 90
  • greater than 90 degrees
  • measure
  • angle measure
  • measure angles
  • angle measures

Background Tutorials

  • Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

      • What is an Angle?What is an Angle?

      What is an Angle?

      Angles are a fundamental building block for creating all sorts of shapes! In this tutorial, learn about how an angle is formed, how to name an angle, and how an angle is measured. Take a look!

Further Exploration

  • Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

      • What are Perpendicular Lines?What are Perpendicular Lines?

      What are Perpendicular Lines?

      Perpendicular lines have a special property. The angles formed by perpendicular lines will always be the same. Check out this tutorial to learn about perpendicular lines and see a cool trick involving these special lines!

  • Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.

      • What are Complementary Angles?What are Complementary Angles?

      What are Complementary Angles?

      Do complementary angles always have something nice to say? Maybe. One thing complementary angles always do is add up to 90 degrees. In this tutorial, learn about complementary angles and see how to use this knowledge to solve a problem involving these special types of angles!

      • What are Supplementary Angles?What are Supplementary Angles?

      What are Supplementary Angles?

      Knowing about supplementary angles can be very useful in solving for missing angle measurements. This tutorial introduces you to supplementary angles and shows you how to use them to solve for a missing angle measurement. Take a look!